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src/Compilers/Core/CodeAnalysisTest/Collections/BadHasher.cs
38 строк
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Sam Harwell
Update code for use in Roslyn
21 янв 2021, 03:00
21 янв 2021, 03:00
b7eef41
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// Licensed to the .NET Foundation under one or more agreements. // The .NET Foundation licenses this file to you under the MIT license. // See the LICENSE file in the project root for more information. // NOTE: This code is derived from an implementation originally in dotnet/runtime: // https://github.com/dotnet/runtime/blob/v5.0.2/src/libraries/System.Collections.Immutable/tests/BadHasher.cs // // See the commentary in https://github.com/dotnet/roslyn/pull/50156 for notes on incorporating changes made to the // reference implementation. using System.Collections.Generic; namespace Microsoft.CodeAnalysis.UnitTests.Collections { /// <summary> /// Produces the same hash for every value. /// </summary> /// <typeparam name="T">The type to hash</typeparam> internal class BadHasher<T> : IEqualityComparer<T> { private readonly IEqualityComparer<T> _equalityComparer; internal BadHasher(IEqualityComparer<T>? equalityComparer = null) { _equalityComparer = equalityComparer ?? EqualityComparer<T>.Default; } public bool Equals(T? x, T? y) { return _equalityComparer.Equals(x, y); } public int GetHashCode(T obj) { return 1; } } }